Chosen Solution
My vacuum suddenly does not charge anymore and it doesn’t work anymore. I have checked the electricity outlet and it is working. Everything seem fine except that it doesn’t charge. The ref light signals that it is out of battery when I press the working button.
Iwngu Wfm could be some wiring etc. but you do want to start with a new battery. If nothing else it will supply you with a know-well starting point for further troubleshooting. Check this video as well as this one for changing the battery. Of course you want to check your charger as well.